An antifouling coating film comprising a binder (A) and an organism repellent (B), having a riblet structure on a surface thereof,
- the organism repellent (B) comprising at least one selected from the group consisting of copper pyrithione, zinc pyrithione, 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile, and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one,
- wherein the binder (A) comprises an antifouling coating composition comprising a binder forming component (a),
- wherein the binder forming component (a) comprises a curable organopolysiloxane.